メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.392285031352 44.165586496933, 142.390763934061 44.1653605064082, 142.391203526253 44.1640666785077, 142.391238877418 44.1640725412765, 142.392653551148 44.164302401615, 142.392285031352 44.165586496933)) ^^http://www.opengis.net/ont/geosparql#wktLiteral